A gentle nudge to write your three lines. It stays quiet on days you have already written.
Entries and photos live only on this device. No account, nothing uploaded. Keep a backup so a lost phone is not a lost journal.
Thankful is a small daily practice: three things you are grateful for, written by hand-ish, kept on your own device. Any day can be given its own paper, and a wax seal marks the days you finish.
The only thing the server ever holds is the address it needs to send your reminder.